title: Serum folic acid and vitamin B12 levels--a preliminary study.
mesh_terms: D000747:Anemia, Hypochromic / Q000097:blood*; D005260:Female; D005492:Folic Acid / Q000097:blood*; D006801:Humans; D008297:Male; D014805:Vitamin B 12 / Q000097:blood*
chemical_list: D005492:Folic Acid; D014805:Vitamin B 12